How can you determine which property of equality is needed to isolate a variable and solve a given equation A. use inverse relationships to undo the operation
B. use the same operation to undo the operation
C. use the distributive property to isolate the variable
D. substitue the known values and simplicity

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m

answer: 1+1

step-by-step explanation: 1+1 is at least 2

the answer to this is a. a^2 + b^2 = c^2